Programming language: Rust
License: MIT License
Tags: Subcommand     Cargo     Statistics     Count     Lines    
Latest version: v0.2.3

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A cargo subcommand for displaying line counts of source code in projects, including a niave unsafe counter for Rust source files. This subcommand was originally based off and inspired by the project tokei by Aaronepower


To count the source code in the Rust repository (checkout 4c99649), and print some naive statistics on how much "unsafe" code exists.

NOTE: The Rust repository is quite large, if you're on a slow internet connect consider using a smaller repository, such as the cargo-count repo.

$ git clone https://github.com/rust-lang/rust
$ cd rust
$ cargo count --separator , --unsafe-statistics
Gathering information...
         Language    Files  Lines    Blanks  Comments  Code     Unsafe (%)
         --------    -----  -----    ------  --------  ----     ----------
         Rust        6,018  528,510  66,984  133,698   327,792  3,163 (0.96%)
         C           54     9,962    1,445   1,492     7,025    7,025 (100.00%)
         CSS         4      1,266    149     52        1,065    
         JavaScript  4      1,118    131     166       821      
         Python      31     4,797    843     585       3,369    
         C Header    13     1,865    284     585       996      996 (100.00%)
         C++         4      1,611    185     81        1,345    1,345 (100.00%)
         --------    -----  -----    ------  --------  ----     ----------
Totals:              6,128  549,129  70,021  136,659   342,413  12,529 (3.66%)

The --separator , sets a , character as the thousands separator, and --unsafe-statistics looks for, and counts lines of unsafe.


cargo-count can be installed with cargo install

$ cargo install cargo-count

This may require a nightly version of cargo if you get an error about the install command not being found. You may also compile and install the traditional way by followin the instructions below.


Follow these instructions to compile cargo-count, then skip down to Installation.

  1. Ensure you have current version of cargo and Rust installed
  2. Clone the project $ git clone https://github.com/kbknapp/cargo-count && cd cargo-count
  3. Build the project $ cargo build --release (NOTE: There is a large performance differnce when compiling without optimizations, so I recommend alwasy using --release to enable to them)
  4. Once complete, the binary will be located at target/release/cargo-count

Installation and Usage

All you need to do is place cargo-count somewhere in your $PATH. Then run cargo count anywhere in your project directory. For full details see below.

Linux / OS X

You have two options, place cargo-count into a directory that is already located in your $PATH variable (To see which directories those are, open a terminal and type echo "${PATH//:/\n}", the quotation marks are important), or you can add a custom directory to your $PATH

Option 1 If you have write permission to a directory listed in your $PATH or you have root permission (or via sudo), simply copy the cargo-count to that directory # sudo cp cargo-count /usr/local/bin

Option 2 If you do not have root, sudo, or write permission to any directory already in $PATH you can create a directory inside your home directory, and add that. Many people use $HOME/.bin to keep it hidden (and not clutter your home directory), or $HOME/bin if you want it to be always visible. Here is an example to make the directory, add it to $PATH, and copy cargo-count there.

Simply change bin to whatever you'd like to name the directory, and .bashrc to whatever your shell startup file is (usually .bashrc, .bash_profile, or .zshrc)

$ mkdir ~/bin
$ echo "export PATH=$PATH:$HOME/bin" >> ~/.bashrc
$ cp cargo-count ~/bin
$ source ~/.bashrc


On Windows 7/8 you can add directory to the PATH variable by opening a command line as an administrator and running

C:\> setx path "%path%;C:\path\to\cargo-count\binary"

Otherwise, ensure you have the cargo-count binary in the directory which you operating in the command line from, because Windows automatically adds your current directory to PATH (i.e. if you open a command line to C:\my_project\ to use cargo-count ensure cargo-count.exe is inside that directory as well).


There are a few options for using cargo-count which should be somewhat self explanitory.

    cargo count [FLAGS] [OPTIONS] [--] [ARGS]

    -S, --follow-symlinks      Follows symlinks and counts source files it finds
    -a, --all                  Do not ignore .gitignored paths
                               (Defaults to false when omitted)
    -h, --help                 Prints help information
        --unsafe-statistics    Displays lines and percentages of "unsafe" code
    -V, --version              Prints version information
    -v, --verbose              Print verbose output

    -l, --language <exts>...    Only count these languges (by source code extension)
                                (i.e. '-l js py cpp')
    -e, --exclude <paths>...    Files or directories to exclude (automatically includes '.git')
        --utf8-rule <rule>      Sets the UTF-8 parsing rule (Defaults to 'strict')
                                 [values: ignore lossy strict]
    -s, --separator <sep>       Set the thousands separator for pretty printing

    to_count...    The files or directories (including children) to count
                   (defaults to current working directory when omitted)

When using '--exclude <path>' the path given can either be relative to the current 
directory, or absolute. When '<path>' is a file, it must be relative to the current 
directory or it will not be found. Example, if the current directory has a child 
directory named 'target' with a child fild 'test.rs' and you use `--exclude target/test.rs' 

Globs are also supported. For example, to exclude 'test.rs' files from all child directories 
of the current directory you could do '--exclude */test.rs'.


cargo-count is released under the terms of the MIT. See the LICENSE-MIT file for the details.

Dependencies Tree

[cargo-count dependencies](cargo-count.png)

*Note that all licence references and agreements mentioned in the cargo-count README section above are relevant to that project's source code only.